Nut and bolt lock.



m. 659,744.' Patented oct. is, |900; E. C. GUERRANT. n NUT AND BOLT Lock.

(Apucmm mea Feb. 5, 1900.)

(No Model.)

ummm

v1ti-"rvtra Smarts ATENT OFFICE.

ESTILL C. GUERRANT, OF MEMPHIS, TENNESSEE, ASSIGNOR OF ONE-FOURTH TO RICHARD P. WOODSON, OF SAME PLACE.

NUT AND BOLT LOCK.

SPEGFCATIO-T forming part of Letters Patent No. 659,744, dated October 16, 1900.

Application filed February 5, 1900. Serial No. 4.026. \N0 model.)

To all la7/,077?, it 7mo/,y concern. y

Be it known that I, EsTiLL C. GUERRANT, a citizen of the United States, residing at Memphis, in the county of Shelbyv and State of Tennessee, have invented certain newand useful Improvements in Nut and Bolt Locks; and I do hereby declarethe following to be a full, clear, and exact description ofthe invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to means for preventing the relative turning of bolts and nuts after the latter have been screwed home. The locking means are located between the nut and bolt and are independent of the part or object bolted. Hence the nut can be secured at any position upon the bolt. In its structural organization the lock comprises a washer having retainingpoints extending into the bolt-opening at diagonally-opposite points, said retaining-points being embedded into opposite sides of the bolt simultaneously with the action of screwing the nut home upon the bolt. Combined with the nut and washer is a second washer adapted to be clamped between the said parts and adapted to have portions bent against the edges of the nut and first-mentioned washer, so as to prevent turning of the nut when properly adj usted.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for eiecting the result reference is to be had to the following description and the drawings hereto attached.

Vhile the essential and characteristic features of the invention are necessarily susceptible of modification, still the preferred embodiment of the invention is illustrated in the accompanying drawings, in which- Figure l is a detail view showing the relative position of the parts after the nut has been screwed upon the bolt and made fast. Eig. 2 is a View similar to Fig. l, showing the disposition of the parts prior to screwing the nut home, the washer having the lockingpoints being in section. Figs. 3 and 4 are top and bottom plan views, respectively, of

Ain Fig. 2.

the washer. Fig. 5 is a detail section of the washer.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

The bolt l is of ordinary formation and is provided at one end with a head and has its shank threaded to receive the nut 2, making screw-thread connection therewith, the ob- 6o ject 3 to be bolted being clamped between the head of the bolt and the nut in the usual manner. The locking means consists, essentially, of washers 4 and 5, which for the sake of clearness and to avoid confusion will be designated, respectively, as the anchoring and locking washers. The washer4is thick and constitutes the anchoring member, whereas the washer 5 is thin and exible and is the locking element. Rigid points or penetrating 7o projections 6 extend into the bolt-opening 7 of the washer 4 at diagonally-opposite points and are adapted to bite into opposite sides of the bolt 1. To facilitate the entrance of the points 6 into the sides of the bolt, said points are of 75 V form, the opposite sides being beveled to a penetrating edge, as most clearly indicated in Figs. 3 and 4. In order to give stability to the points 6, they extend from the top to the bottom side of the washer and taper through- 8o out their length inversely, as shown most clearly in Figs. 2 and 5, at an oblique angle to the axis of the bolt-hole. As a result of the diagonal disposition of the points 6 the washer 4 when placed upon the bolt assumes 8 5 an oblique or inclined position, as indicated The lower corner of the anchoring-washer obtains a purchase against the object 3, and the upper corner is engaged by the nut 2 and is gradually forced toward the 9o adjacent side of the object 3 when screwing the nut 2 home. This operation gradually forces the points 6 into opposite sides of the bolt and prevents any turning of the Washer thereon or the bolt within the washer.

The lock-washer 5 is placed between the anchoring-washer 4 and the nut 2 and is clamped between them, and after the nut 2 has been turned up tight upon the bolt opposite portions of the washer 5 are reversely roo 'and lthe nut removed in the ordinary manner. The anchoring-washer can be disengaged by forcing a cold-chisel or other imp1ement between the washer 4 and the part 3 opposite the lower-most point 6, so as to clamp the washer into the position substantially as shown in Fig. 2, when it can be readily removed from the bolt and the parts used again in the inannerstated.

Having thus described the invention, what is claimed as new, and desired to be Secured by Letters Patent, is

1. In a nut and bolt lock, a Washer, having rigid points or biting projections arranged in the bolt-opening at diagonally-opposite points and tapering inversely throughout their length at an oblique angle to the axis of said bolt-opening and having their sides beveled to a penetrating edge, said points being adapted to be forced into opposite sides of the bolt upon forcing the washer from an oblique to a right-angular position thereon simultaneously with the screwing home of the n nt, substantially as described.

2, In combination with a bolt, and coperating nut, an anchOringWaSher having rigid points or biting projections arranged in the bolt-opening at diagonally-opposite points and tapering inversely throughout their length at an oblique angle to the axis of said bolt-opening an d having their sides beveled to a penetrating edge, said point-s being adapted to be forced into opposite sides of the bolt upon forcing the washer from an oblique to arightangular position thereon simultaneously with the screwing home of the nut, and a lock- Awasher adapted to be clamped between the anchoring-washer and nut and adapted to have portions reversely bent to engage with, respectively, the anchoring-washer and nut, substantially as described.

In testimony whereof I aix my signature in presence of two witnesses.

ESTILL C. i GUERRANT.

Witnesses: l

PETER BRICKEY, L. ROBINSON, 

